Gas discharge lamp ballast



FIG. 1 is a top, front and left side perspective view of a gas discharge lamp ballast showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a bottom plan view thereof.

The connector blocks in FIG. 1, FIG. 2, and FIG. 3 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a gas discharge lamp ballast, as shown and described. 